09 May, 2015
10 commits
-
To make it generally accessible by other tools/ projects, also will be
used in the tools/arch/*/include/asm/barrier.h files that are being
introduced now.Cc: Adrian Hunter
Cc: Borislav Petkov
Cc: David Ahern
Cc: Don Zickus
Cc: Frederic Weisbecker
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-qnjdqwu3vcnt14vqmr6wu788@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
We will need it for atomic.h, so move it from the ad-hoc tools/perf/
place to a tools/ subset of the kernel arch/ hierarchy.Cc: Adrian Hunter
Cc: Borislav Petkov
Cc: David Ahern
Cc: Don Zickus
Cc: Frederic Weisbecker
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-zv4x77074resrkl4ayzf5e7d@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
We will need it for atomic.h, so move it from the ad-hoc tools/perf/
place to a tools/ subset of the kernel arch/ hierarchy.Cc: Adrian Hunter
Cc: Borislav Petkov
Cc: David Ahern
Cc: Don Zickus
Cc: Frederic Weisbecker
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-pk6f5x9vh8k2ebzhh9uj5wo2@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
We will need it for atomic.h, so move it from the ad-hoc tools/perf/
place to a tools/ subset of the kernel arch/ hierarchy.Other aches will follow, each in a cset.
Cc: Adrian Hunter
Cc: Borislav Petkov
Cc: David Ahern
Cc: Don Zickus
Cc: Frederic Weisbecker
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Stephane Eranian
Link: http://lkml.kernel.org/n/tip-vy6bqmsvm6puibpay2cy4wid@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
$params is similar to $vars but matches only function parameters not
local variables.Thus, this is useful for tracing function parameter changing or tracing
function call with parameters.Testing it:
# perf probe tcp_sendmsg '$params'
Added new event:
probe:tcp_sendmsg (on tcp_sendmsg with $params)You can now use it in all perf tools, such as:
perf record -e probe:tcp_sendmsg -aR sleep 1
# perf probe -l
probe:tcp_sendmsg (on tcp_sendmsg@acme/git/linux/net/ipv4/tcp.c with iocb sk msg size)
# perf record -a -e probe:*
press some random letters to generate TCP (sshd) traffic...^C[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.223 MB perf.data (6 samples) ]# perf script
sshd 6385 [2] 3.907529: probe:tcp_sendmsg: iocb=0xffff8800ac4cfe70 sk=0xffff88042196c140 msg=0xffff8800ac4cfda8 size=0x24
sshd 6385 [2] 4.138973: probe:tcp_sendmsg: iocb=0xffff8800ac4cfe70 sk=0xffff88042196c140 msg=0xffff8800ac4cfda8 size=0x24
sshd 6385 [2] 4.378966: probe:tcp_sendmsg: iocb=0xffff8800ac4cfe70 sk=0xffff88042196c140 msg=0xffff8800ac4cfda8 size=0x24
sshd 6385 [2] 4.603681: probe:tcp_sendmsg: iocb=0xffff8800ac4cfe70 sk=0xffff88042196c140 msg=0xffff8800ac4cfda8 size=0x24
sshd 6385 [2] 4.818455: probe:tcp_sendmsg: iocb=0xffff8800ac4cfe70 sk=0xffff88042196c140 msg=0xffff8800ac4cfda8 size=0x24
sshd 6385 [2] 5.043603: probe:tcp_sendmsg: iocb=0xffff8800ac4cfe70 sk=0xffff88042196c140 msg=0xffff8800ac4cfda8 size=0x24
# cat /sys/kernel/debug/tracing/events/probe/tcp_sendmsg/format
name: tcp_sendmsg
ID: 1927
format:
field:unsigned short common_type; offset:0; size:2; signed:0;
field:unsigned char common_flags; offset:2; size:1; signed:0;
field:unsigned char common_preempt_count; offset:3; size:1; signed:0;
field:int common_pid; offset:4; size:4; signed:1;field:unsigned long __probe_ip; offset:8; size:8; signed:0;
field:u64 iocb; offset:16; size:8; signed:0;
field:u64 sk; offset:24; size:8; signed:0;
field:u64 msg; offset:32; size:8; signed:0;
field:u64 size; offset:40; size:8; signed:0;print fmt: "(%lx) iocb=0x%Lx sk=0x%Lx msg=0x%Lx size=0x%Lx", REC->__probe_ip, REC->iocb, REC->sk, REC->msg, REC->size
#Do some system wide tracing of this probe + write syscalls:
# perf trace -e write --ev probe:* --filter-pids 6385
462.612 (0.010 ms): bash/19153 write(fd: 1, buf: 0x7f7556c78000, count: 29 ) = 29
462.701 (0.027 ms): sshd/19152 write(fd: 3, buf: 0x7f78dd12e160, count: 68 ) ...
462.701 ( ): probe:tcp_sendmsg:(ffffffff8163db30) iocb=0xffff8803ebec7e70 sk=0xffff88042196ab80 msg=0xffff8803ebec7da8 size=0x44)
462.710 (0.035 ms): sshd/19152 ... [continued]: write()) = 68
462.787 (0.009 ms): bash/19153 write(fd: 2, buf: 0x7f7556c77000, count: 22 ) = 22
462.865 (0.002 ms): sshd/19152 write(fd: 3, buf: 0x7f78dd12e160, count: 68 ) ...
462.865 ( ): probe:tcp_sendmsg:(ffffffff8163db30) iocb=0xffff8803ebec7e70 sk=0xffff88042196ab80 msg=0xffff8803ebec7da8 size=0x44)
462.873 (0.010 ms): sshd/19152 ... [continued]: write()) = 68Signed-off-by: Masami Hiramatsu
Tested-by: Arnaldo Carvalho de Melo
Cc: Ananth N Mavinakayanahalli
Cc: David Ahern
Cc: Hemant Kumar
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20150506124653.4961.59806.stgit@localhost.localdomain
[ Add some examples to the changelog message showing how to use it ]
Signed-off-by: Arnaldo Carvalho de Melo -
Skip the kernel symbols which is out of .text, e.g. the functions
in .inittext. Those are found in debuginfo/kallsyms, but already
freed from memory.e.g.
----
# perf probe vfs_caches_init
vfs_caches_init+0 is out of .text, skip it.
Probe point 'vfs_caches_init' not found.
Error: Failed to add events.
----Signed-off-by: Masami Hiramatsu
Tested-by: Arnaldo Carvalho de Melo
Cc: Ananth N Mavinakayanahalli
Cc: David Ahern
Cc: Hemant Kumar
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20150506124649.4961.56249.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo -
Fix --line to check valid C-style function name and returns
a semantic error if it is not.For example, previously, --line doesn't support lazy pattern
but it doesn't recognized as a semantic error.----
# perf probe -L 'func;return*:0-10'
Specified source line is not found.
Error: Failed to show lines.
----With this patch, it is correctly handled as a semantic error.
----
# perf probe -L 'func;return*:0-10'
Semantic error :'func;return*' is not a valid function name.
...
----Signed-off-by: Masami Hiramatsu
Tested-by: Arnaldo Carvalho de Melo
Cc: Ananth N Mavinakayanahalli
Cc: David Ahern
Cc: Hemant Kumar
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20150506124647.4961.99473.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo -
Fix to return 0 when positive value returned from probe command.
At least --vars can returns a positive value if it found a point.
----
# perf probe --vars vfs_read && echo succeeded! || echo failed!
Available variables at vfs_read
@
char* buf
loff_t* pos
size_t count
struct file* file
failed!
----This fixes above problem.
----
# perf probe --vars vfs_read && echo succeeded! || echo failed!
Available variables at vfs_read
@
char* buf
loff_t* pos
size_t count
struct file* file
succeeded!
----Signed-off-by: Masami Hiramatsu
Tested-by: Arnaldo Carvalho de Melo
Cc: Ananth N Mavinakayanahalli
Cc: David Ahern
Cc: Hemant Kumar
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20150506124645.4961.56973.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo -
Fix to pass O_APPEND by using bit-or with other flags, instead of
passing it as mode.Signed-off-by: Masami Hiramatsu
Cc: Ananth N Mavinakayanahalli
Cc: David Ahern
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: hemant@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/20150506124642.4961.97878.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo -
Fix perf-probe to close probe_events file if it failed to get existing
probe's name. This also fix the return error code to -ENOMEM.Signed-off-by: Masami Hiramatsu
Cc: Ananth N Mavinakayanahalli
Cc: David Ahern
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: hemant@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/20150506124640.4961.26062.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo
08 May, 2015
2 commits
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On powerpc the perf event interrupt is not masked when interrupts are
disabled, allowing it to function as an NMI.This causes problems if perf is using vmalloc. If we take a page fault
on the vmalloc region the fault handler will fail the page fault because
it detects we are coming in from an NMI (see do_hash_page()).We don't actually need or want vmalloc backed perf so just disable it on
powerpc.Signed-off-by: Michael Ellerman
Signed-off-by: Peter Zijlstra (Intel)
Cc:
Cc: Andrew Morton
Cc: Anton Blanchard
Cc: Borislav Petkov
Cc: H. Peter Anvin
Cc: Paul Mackerras
Cc: Thomas Gleixner
Cc: acme@ghostprotocols.net
Cc: sukadev@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1430720799-18426-1-git-send-email-mpe@ellerman.id.au
Signed-off-by: Ingo Molnar -
Stephane asked about PERF_COUNT_SW_CPU_MIGRATIONS and I realized it
was borken:> The problem is that the task isn't actually scheduled while its being
> migrated (obviously), and if its not scheduled, the counters aren't
> scheduled either, so there's no observing of the fact.
>
> A further problem with migrations is that many migrations happen from
> softirq context, which is nested inside the 'random' task context of
> whoemever happens to run at that time, similarly for the wakeup
> migrations triggered from (soft)irq context. All those end up being
> accounted in the task that's currently running, eg. your 'ls'.The below cures this by marking a task as migrated and accounting it
on the subsequent sched_in().Signed-off-by: Peter Zijlstra (Intel)
Cc: Andrew Morton
Cc: Borislav Petkov
Cc: H. Peter Anvin
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Stephane Eranian
Cc: Thomas Gleixner
Signed-off-by: Ingo Molnar
06 May, 2015
23 commits
-
…it/acme/linux into perf/core
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
User visible changes:
- Improve --filter support for 'perf probe', allowing using its arguments
on other commands, as --add, --del, etc (Masami Hiramatsu)- Show warning when running 'perf kmem stat' on a unsuitable perf.data file,
i.e. one with events that are not the ones required for the stat variant
used (Namhyung Kim).Infrastructure changes:
- Auxtrace support patches, paving the way to support Intel PT and BTS (Adrian Hunter)
- hists browser (top, report) refactorings (Namhyung Kim)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org> -
The has_children and unfolded fields don't belong to the struct
map_symbol since they're used by the TUI only. Move those fields out of
map_symbol since the struct is also used by other places.This will also help to compact the sizeof struct hist_entry.
Signed-off-by: Namhyung Kim
Cc: David Ahern
Cc: Jiri Olsa
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1429687101-4360-11-git-send-email-namhyung@kernel.org
Link: http://lkml.kernel.org/r/1430837746-5439-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
Now LEFT key press action can just use do_zoom_dso/thread() code to get
out of the current filter.Signed-off-by: Namhyung Kim
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1429838133-14001-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
The pstack_peek() is to get the topmost entry without removing it.
Signed-off-by: Namhyung Kim
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1429838133-14001-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
Currently perf_evsel__hists_browse() function spins on a huge loop and
handles many key actions. Since it's hard to read and modify, let's
split it out into small helper functions.The add_XXX_opt() functions are to register popup menu item on the
selected entry. When it adds an item, it also saves related data into
struct popup_action and returns 1 so that it can increase the number of
items (nr_options).With this change, we can simplify the code just to call selected
callback function without considering various conditions. A callback
function named do_XXX is called with saved data when the item is
selected by user.No functional change intended.
Signed-off-by: Namhyung Kim
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1429687101-4360-9-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
Currently perf_evsel__hists_browse() function spins on a huge loop and
handles many key actions. Since it's hard to read and modify, let's
split it out into small helper functions.This patch introduces do_XXX() functions which corresponds to each goto
label. This way we can call such functions both from key press actions
and popup menu actions.No functional change intended.
Signed-off-by: Namhyung Kim
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1429687101-4360-8-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
The perf_session_env is to save system informantion at the recording
time to be refered in the hist browser. So it'd be better to keep in
the struct hist_browser. This is a preparation to later change.Signed-off-by: Namhyung Kim
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1429687101-4360-7-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
The struct pstack is to save currently applied thread and/or dso filters
in the browser. So it'd be better to keep in the struct hist_browser.
This is a preparation to later change.Suggested-by: Arnaldo Carvalho de Melo
Signed-off-by: Namhyung Kim
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1429687101-4360-6-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
The struct hist_browser_timer is to carry perf-top related info
throughout the hist browser code. So it'd be better to keep in the
struct hist_browser. This is a preparation to later change.Suggested-by: Arnaldo Carvalho de Melo
Signed-off-by: Namhyung Kim
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1429687101-4360-5-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
The options array saves strings for each popup menu item. The number of
items can be vary according to the currently selected item. So it can
leak some memory if it's exited from a small item. Fix it by freeing
all items when loop terminates.Signed-off-by: Namhyung Kim
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1429687101-4360-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
The init_have_children is used to init callchain info only for TUI. So
it'd be better to move it to the TUI-specific unnamed union member.Signed-off-by: Namhyung Kim
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1429687101-4360-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
Since perf diff only supports stdio output, TUI fields are only accessed
from perf report (or perf top). So add a new unnamed union and move
struct hist_entry_tui and those TUI-specific fields.Signed-off-by: Namhyung Kim
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/1429687101-4360-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
Sometimes one can mistakenly run 'perf kmem stat' without running 'perf
kmem record' before or with a different configuration like recording
--slab and stat --page. Show a warning message like the one below to
inform the user:# perf kmem stat --page --caller
No page allocation events found. Have you run 'perf kmem record --page'?Signed-off-by: Namhyung Kim
Acked-by: Pekka Enberg
Cc: David Ahern
Cc: Jiri Olsa
Cc: Joonsoo Kim
Cc: Minchan Kim
Cc: Peter Zijlstra
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/1430837572-31395-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
To simplify the 'perf probe' command code, consolidate some similar
functions and use command short-name for command classification, instead
of separate booleans.Signed-off-by: Masami Hiramatsu
Cc: David Ahern
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20150505152257.18790.41548.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo -
Since params.filter will be released in cleanup_params, we don't need to
clear it in each command.Signed-off-by: Masami Hiramatsu
Cc: David Ahern
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20150505022952.23399.58072.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo -
This allows the user to pass the filter pattern directly to the --funcs
option as below:----
# ./perf probe -F *kmalloc
__kmalloc
devm_kmalloc
mempool_kmalloc
sg_kmalloc
sock_kmalloc
----We previously needed to use the --filter option for that.
Signed-off-by: Masami Hiramatsu
Tested-by: Arnaldo Carvalho de Melo
Cc: David Ahern
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20150505022950.23399.22435.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo -
This makes perf-probe --del option to accept filter rules
not only simple glob pattern. This simplifies the code and
improve the flexibility.E.g. if we remove 2 different pattern events, we need 2
-d options.
----
# ./perf probe -d vfs\* -d malloc
Removed event: probe_libc:malloc
Removed event: probe:vfs_read
----This allows you to joint the 2 patterns with '|'.
----
# ./perf probe -d 'vfs*|malloc'
Removed event: probe:vfs_read
Removed event: probe_libc:malloc
----Signed-off-by: Masami Hiramatsu
Tested-by: Arnaldo Carvalho de Melo
Cc: David Ahern
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/20150505022948.23399.4197.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo -
Add a new option and support for Instruction Tracing Snapshot Mode.
When the new option is selected, no AUX area tracing data is captured
until a signal (SIGUSR2) is received.Signed-off-by: Adrian Hunter
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/r/1430404667-10593-10-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo -
Add support for making snapshots of AUX area tracing data.
Signed-off-by: Adrian Hunter
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/r/1430404667-10593-9-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo -
Add support for the PERF_RECORD_ITRACE_START event type. This event can
be used to determine the pid and tid that are running when Instruction
Tracing starts. Generally that information would come from a
sched_switch event but, at the start, no sched_switch events may yet
have been recorded.Signed-off-by: Adrian Hunter
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/r/1430404667-10593-8-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo -
Add support for the PERF_RECORD_AUX event type.
PERF_RECORD_AUX is a new kernel event that records when new data lands
in the AUX buffer. Currently it is assumed that AUX data follows the
same ring buffer conventions used by the perf events buffer, and
consequently the AUX event is not processed during recording.It is processed during session processing so that the information in the
'flags' member is made available.The format of PERF_RECORD_AUX is outlined in the linux/perf_events.h
header file. The 'flags' are also enumerated.Intel PT and Intel BTS use the flag named PERF_AUX_FLAG_TRUNCATED to
determine if data has been lost because the buffer became full as perf
was not able to empty it fast enough.Signed-off-by: Adrian Hunter
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/r/1430404667-10593-7-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo -
Add AUX area tracing option 'x' to synthesize events for transactions.
This will be used by Intel PT to synthesize an event record for each TSX
start, commit or abort.Signed-off-by: Adrian Hunter
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/r/1430404667-10593-6-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo -
Add build option NO_AUXTRACE to exclude compiling support for AUX area
tracing. Support for both recording and processing is excluded and by
implication any future additions such as Intel PT and Intel BTS will
also not be compiled in with this option.Signed-off-by: Adrian Hunter
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/r/1430404667-10593-5-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo
05 May, 2015
5 commits
-
We need to include all buildids when a perf.data file contains AUX area
tracing data because we do not decode the trace for that purpose because
it would take too long.Signed-off-by: Adrian Hunter
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/r/1430404667-10593-4-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo -
Add an index of AUX area tracing events within a perf.data file.
perf record uses a special user event PERF_RECORD_FINISHED_ROUND to
enable sorting of events in chunks instead of having to sort all events
altogether.AUX area tracing events contain data that can span back to the very
beginning of the recording period. i.e. they do not obey the rules of
PERF_RECORD_FINISHED_ROUND.By adding an index, AUX area tracing events can be found in advance and
the PERF_RECORD_FINISHED_ROUND approach works as usual.The index is recorded with the auxtrace feature in the perf.data file.
A session reads the index but does not process it. An AUX area decoder
can queue all the AUX area data in advance using
auxtrace_queues__process_index() or otherwise process the index in some
custom manner.Signed-off-by: Adrian Hunter
Acked-by: Jiri Olsa
Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/r/1430404667-10593-3-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo -
Unwittingly the itrace options for perf report ended up below the
Overhead Calculation section. Move it back with the other options.Signed-off-by: Adrian Hunter
Cc: David Ahern
Cc: Frederic Weisbecker
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Peter Zijlstra
Cc: Stephane Eranian
Link: http://lkml.kernel.org/r/1430404667-10593-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo -
Currently perf kmem command will select --slab if neither --slab nor
--page is given for backward compatibility. Add kmem.default config
option to select the default value ('page' or 'slab').# cat ~/.perfconfig
[kmem]
default = page# perf kmem stat
SUMMARY (page allocator)
========================
Total allocation requests : 1,518 [ 6,096 KB ]
Total free requests : 1,431 [ 5,748 KB ]Total alloc+freed requests : 1,330 [ 5,344 KB ]
Total alloc-only requests : 188 [ 752 KB ]
Total free-only requests : 101 [ 404 KB ]Total allocation failures : 0 [ 0 KB ]
...Signed-off-by: Namhyung Kim
Acked-by: Pekka Enberg
Cc: David Ahern
Cc: Jiri Olsa
Cc: Joonsoo Kim
Cc: Minchan Kim
Cc: Peter Zijlstra
Cc: Taeung Song
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/1429592107-1807-6-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo -
Save libtraceevent output and print it in the header.
# perf kmem stat --page --caller
#
# GFP flags
# ---------
# 00000010: NI: GFP_NOIO
# 000000d0: K: GFP_KERNEL
# 00000200: NWR: GFP_NOWARN
# 000084d0: K|R|Z: GFP_KERNEL|GFP_REPEAT|GFP_ZERO
# 000200d2: HU: GFP_HIGHUSER
# 000200da: HUM: GFP_HIGHUSER_MOVABLE
# 000280da: HUM|Z: GFP_HIGHUSER_MOVABLE|GFP_ZERO
# 002084d0: K|R|Z|NT: GFP_KERNEL|GFP_REPEAT|GFP_ZERO|GFP_NOTRACK
# 0102005a: NF|HW|M: GFP_NOFS|GFP_HARDWALL|GFP_MOVABLE---------------------------------------------------------------------------------------------------------
Total alloc (KB) | Hits | Order | Mig.type | GFP flags | Callsite
---------------------------------------------------------------------------------------------------------
60 | 15 | 0 | UNMOVABL | K|R|Z|NT | pte_alloc_one
40 | 10 | 0 | MOVABLE | HUM|Z | handle_mm_fault
24 | 6 | 0 | MOVABLE | HUM | do_wp_page
24 | 6 | 0 | UNMOVABL | K | __pollwait
...Requested-by: Joonsoo Kim
Suggested-by: Minchan Kim
Signed-off-by: Namhyung Kim
Acked-by: Pekka Enberg
Tested-by: Arnaldo Carvalho de Melo
Cc: David Ahern
Cc: Joonsoo Kim
Cc: Minchan Kim
Cc: Peter Zijlstra
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/1429592107-1807-5-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo